News Michael Jackson Doctor Won't Testify By Bryan Lynn 10:44 AM PDT, November 1, 2011 Getty Images Michael Jackson's doctor says he will not testify in his trial on involuntary manslaughter charges in the death of the pop star.Dr. Conrad Murray informed the judge of his decision Tuesday outside the presence of jurors. Murray had previously left the possibility open that he might take the witness stand in his own defense. Testimony was continuing in the case on Tuesday, with jurors hearing from various medical experts.Murray has pleaded not guilty to involuntary manslaughter in connection with Jackson's June 2009 death. He could face up to four years in prison and the loss of his medical license if convicted.